ISCS method for the performance‐based seismic design of vertically irregular reinforced concrete frame structures

Men, Jinjie; Shi, Qingxuan

doi:10.1002/tal.759

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…The procedure of computation is shown in Fig. (6), in which the target ductility factor is obtained in Eq (8) Where, V ir and V ir1 stand for the initial and target base shear demand from irregular structures; and μ 1 stands for elastic ductility demand.…”

Section: Methods Of Analysismentioning

confidence: 99%

Seismic Ductility Reduction of Flexural-type Structures with Vertical Irregularities

Zhao¹,

Hu²,

Long³

2016

TOCIEJ

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Seismic ductility reduction factors for flexural-type structures with vertical irregularities subjected to pulse-like and nonpulse-like ground motions are investigated in this paper. By establishing various multi-node flexural cantilever-column models, the ductility reduction factor of vertically irregular structures is studied by modifying the ductility reduction factor of irregular structures. The effects of various factors such as ductility level, irregular ratio and pulse-like earthquake excitation on modification coefficient are also explored. The analysis results reveal that: 1) the modification coefficient decreases with smaller irregularity ratio; 2) ductility reduction factors for vertically irregular structures are significantly smaller than those of regular structures; 3) ductility level exerts a certain influence on ductility reduction factor without an obvious trend; and 4) the modification coefficient under pulse-like excitation is smaller than those from non-pulse-like motions and the influence of pulse-like earthquake is coupled with irregularity ratio. This paper concludes with the statistical outcomes based on average of results and recommends modified factors for practice uses.

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Section: Methods Of Analysismentioning

confidence: 99%

Seismic Ductility Reduction of Flexural-type Structures with Vertical Irregularities

Zhao¹,

Hu²,

Long³

2016

TOCIEJ

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“…The second aspect is the analysis of the seismic response demand of the vertically irregular structures [Choi, 2004;Chintanapakdee and Chopra, 2004;Athanassiadou, 2008;Basu, 2009;Lee 2011;Sehgal et al, 2011;Kirac et al, 2012;Sadashiva et al 2012;Zhou et al, 2011b;Mondal and Tesfamariam, 2014;Varadharajan et al, 2014]. The third aspect is to propose simplified methods to assess seismic performance and control measures for seismic design [Fragiadakis et al, 2006;Men et al, 2008;Sarkara et al, 2010;Zhou et al, 2013c]. The research covering the seismic performance of vertically irregular structures in the past 30-plus years has been reviewed in several pieces of literature [Doni and Mistry, 2006;Zhou et al, 2009a;Habibi and Asadi, 2013;Mondal and Tesfamariam, 2014].…”

Section: Introductionmentioning

confidence: 99%

Least Favorable Probability of Failure for 5- and 10-story RC Frame Structures with Vertical Irregularities

Zhou

Zhao

Mao

2015

Journal of Earthquake Engineering

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This article evaluates the seismic control effect of vertical irregularity factors for RC frame structures using the Monte Carlo simulation method. Typical 5-and 10-story frame structures with different irregularities of strength or stiffness are assessed. The upper-and lower-bound probabilities of failure exceeding the limit state are studied. The results indicate that the exceeding probability increases as the vertical irregularity factor decreases. The upper-bound probability of failure, which is sensitive to the vertical irregularities and is an effective indicator for evaluating the performance control parameter, is significantly larger compared with the lower-bound probability of failure. A minimum strength and stiffness irregularity factor of 0.7 can serve as the seismic control limit.

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“…e embedded steel plate and frame are connected by a splice bar as transition and then connected through welding or high-strength bolt. e steel plate only bears the horizontal load, and the steel frame assumes the vertical load is borne by a steel frame [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Study on the Seismic Performance of Box-Plate Steel Structure Modular Unit

Mao

Qin

Lan

2019

Advances in Materials Science and Engineering

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To study the seismic performance of the box-plate steel structure system, two three-storey single box-plate steel structure space stress-bearing unit test pieces have been designed and fabricated according to the 1 : 3 reduced scale. In addition, the quasi-static loading test has been performed on the test pieces where the destruction process, destroy mode, bearing capacity, hysteretic behavior, etc., have been studied and the impact of reinforcing measures with a corner or not on the seismic performance of test pieces has been mainly analyzed. The test results show that the destruction of the box-plate steel structure modular unit under the low cyclic loading effect starts with corner buckling and ends with corner wallboard tear. The test piece has excellent bearing capacity and energy dissipation; the corner reinforcing structure measure also has enhanced the seismic performance of the modular unit. Based on the test, we have taken finite element numerical simulation to the test pieces, compared the analysis result of the test with the finite element, and verified the effectiveness of the finite element analysis method. This paper designs four groups of 64 finite element model test pieces and discusses the influence law of the height-thickness ratio of the wallboard, flexibility coefficient of corner reinforcing structure rib, and axial compression ratio to the seismic performance of the modular unit. The results show that the bearing capacity of the test piece is decreased with the increase of axial compression ratio under the premise that the wallboard height-thickness ratio and flexibility coefficient of the corner reinforcing structure rib are certain. Based on the above analysis results, we have put forward the lateral force resistance calculation model of the reinforcing structure modular unit with or without corner.

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ISCS method for the performance‐based seismic design of vertically irregular reinforced concrete frame structures

Cited by 11 publications

References 7 publications

Seismic Ductility Reduction of Flexural-type Structures with Vertical Irregularities

Seismic Ductility Reduction of Flexural-type Structures with Vertical Irregularities

Least Favorable Probability of Failure for 5- and 10-story RC Frame Structures with Vertical Irregularities

Study on the Seismic Performance of Box-Plate Steel Structure Modular Unit

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